10.1.2 Fault Code Table - Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual

Fault category W (maintenance codes)

10.1.2 Fault code table

Description
200 O Boiler in heating mode
201 O Boiler in hot water mode
202 O Boiler in anti-cycle mode
203 O Boiler in standby, no heat energy demand
204 O Current prim. water temp. higher than set
val.
208 O Chimney sweep demand
214 V Fan shut down during safety time
224 V Maximal flue gas thermostat or heat
exchanger maximal thermostat has
activated
227 V No flame signal after ignition
228 V Flame signal without flame present
229 B Flame failed during burner operation
Greenstar 8000 Life – 6720883865 (2021/11)
Remedy
Operating message, is not a fault.
Operating message, is not a fault.
Operating message, is not a fault.
Operating message, is not a fault.
The actual boiler water temperature is higher than the target boiler water temperature.
The boiler is switched off.
Operating message, is not a fault.
1. Reset the appliance.
2. Create a heat demand does the boiler fire up.
3. Check the voltage to the fan and the continuity of the fan harness.
4. Check the power modulation on the fan.
5. PCB is may be defective.
1. Check if lead disconnected from the safety temperature limiter.
2. Check the high limit of the safety temperature limiter and the harness for
continuity.
3. Check the flow temperature to confirm actual temperature (may tripped out at
lower temperature, leading to safety temperature limiter fault)
4. Check the system pressure and top up as required.
5. Check if air trapped in the system and in the boiler.
6. Pump seized/not running: check the pump for failure or if she blocked.
7. Check if blockage/restriction within boiler/pipe work restricting the flow.
Tip: Check the ceramic insulator is not damaged, this can cause the spark to earth,
twist and pull the ceramic insulator to ensure it is not broken.
1. Check the gas supply to property and the inlet on the gas valve.
2. Check the low pressure when the gas valve opens.
3. Gas valve failing to open: check for voltage to the valve and for possible blockage
on inlet filter of the gas valve.
4. Obstruction in the air intake to the fan leading to incorrect CO
damaged or stucked.
5. Condensate trap is blocked or restricted. Condensate pipe is frozen.
6. Flue is blocked or restricted.
7. Heat exchanger is blocked or restricted.
8. Check the burner for damage.
9. Check the spark electrode or the lead failure.
10.Check the flame sense or the lead failure.
11.Check the rectification ground (black wire to heat exchanger).
Tip: Check the ceramic insulator is not damaged, this can cause the spark to earth,
twist and pull the ceramic insulator to ensure it is not broken.
1. Check the flame sense and the lead and replace if required.
2. Check the earth tags on the boiler and on the electrodes.
3. Check the operation of the siphon and no water collecting in the sump.
4. Replace the air and/or gas ratio control valve.
5. Replace the control unit and/or burner control unit.
Tip: Check the ceramic insulator is not damaged, this can cause the spark to earth,
twist and pull the ceramic insulator to ensure it is not broken.
1. Check the gas supply to the property and check the working pressure on the gas
valve inlet.
2. Check the gas-air ratio.
3. Check the ionisation electrode and the harness for damage or contamination.
4. LPG: Sufficient gas in the tank or recently refilled?
Fault finding and diagnosis
ratio. Diaphragm is
2
75